Shell of Angaria delphinus form atrata with operculum taken by gill net in 5 to 10 fathoms off Minabe, in Japan.Apical view of another color form of Angaria delphinus showing variability of the species.
The shell of this species is variable in degree of sculpture, depending on how exposed or sheltered the environment is in which the snail lives. These different forms are called ecomorphs. The shells can reach 73 mm in size.[2]
^Bieler R, Bouchet P, Gofas S, Marshall B, Rosenberg G, La Perna R, Neubauer TA, Sartori AF, Schneider S, Vos C, ter Poorten JJ, Taylor J, Dijkstra H, Finn J, Bank R, Neubert E, Moretzsohn F, Faber M, Houart R, Picton B, Garcia-Alvarez O, eds. (2010). "Angaria delphinus (Linnaeus, 1758)". MolluscaBase. World Register of Marine Species. Retrieved 17 April 2021.
Dautzenberg, P. (1923). Liste preliminaire des mollusques marins de Madagascar et description de deux especes nouvelles. Journal de Conchyliologie 68: 21-74.
Dautzenberg, Ph. (1929). Mollusques testaces marins de Madagascar. Faune des Colonies Francaises, Tome III.
Monsecour K. & Monsecour D. (2006) The genus Angaria Röding, 1798 (Gastropoda: Turbinidae) in New Caledonia, with description of a new species. Visaya 1(6): 9-16.